TY JOUR TI THE REDUCING OF MACHINEIMPACTON THE SOILIN THE CONDUCTING OF THE IMPROVEMENT THINNING KW soil compaction KW mineralization KW rut formation KW root system KW skidder machines JO Bulletin of KSAU AU Andronov, A.V. AU Valyazhonkov, V.D. AU Dobrynin, Y.A. PY 2014 IS PB Krasnoyarsk State Agrarian University